Apparatus for feeding foil



June 1, 1943. H. F. HILD 2,320,729

APPARATUS FOR FEEDING FOIL Original Filed March 15, 1939 Q INVENTQR' @M 9 PM ATTORNEYS Patented June 1, 1943 APPARATUS FOR FEEDING FOIL Henry Frank Hild, Philadelphia, Pa., assignor to Condenser Corporation of America, South Plainfield, N. J a corporation of New York Original application March 15, 1939, Serial No.

261,952, now Patent No. 2,228,764, dated January 14, 1941. Divided and this application October 7, 1940, Serial No. 360,104

2 Claims.

This invention relates to a feeding mechanism for feeding foil strips to a mandrel on which they are to be wound in conjunction with insulating strips into condenser rolls.

The' principal object of the invention is to facilitate feeding of the foil strips so that the foil does not tear and also so that if a foil strip being wound into the roll should not happen to be firmly held at the mandrel it will still feed into the mandrel when the mandrel is turned. This is a division of my copending application Serial No. 261,952, filed March.15, 1939, now

Patent No. 2,228,764.

The invention will be more fully understood from the following detailed description considered with reference to the accompanying draw ing which illustrates a side view of a strip feed ing mechanism constructed according to this invention and adapted to be associated with winding apparatus.

The Winding machine comprises a frame supporting a vertical panel H which supports pins l2, I4, l5, l6 and I8, carrying rotatable bushings, which hold rolls of insulating material such as paper. Rolls I, 2, 3 and 4 are paper rolls and rolls 90 and 9| are foil rolls. At the opposite end of frame from the panel ll there is fastened a stud on which is journaled a hand wheel which acts as a manually rotatable mandrel support;

this winding mechanism being indicated generally at W in the dot and dash outline and being, for instance, as shown in my Patent No. 2,228,764.

Any source of power may be used for driving the mandrels on the mandrel support to Wind the foil and paper strips into the condenser roll. For this purpose the strips of foil and insulation are carried from their respective rolls over pin 2! one mandrel is wound up with the required num ber of turns, its rotation may be stopped and the hand wheel may then be turned to bring the next succeeding mandrel into operating relation with the source of power. The strips of foil and insulation are suitably cut and the roll held in place by a sticker.

The drawing illustrates an embodiment of the foil and paper roll arrangement in which the foil rolls are driven directly from insulation rolls. Theinsulation rolls I. 2, 3. and 4 are independently mounted on studs projecting from the panel I l and the foil rolls 90 and 9| are placed on studs 50 and 5|, respectively, which are fastened to respective arms 52 and 53 pivoted to the panel at 54 and 55, respectively. Owing to their weight, the foil rolls 90 and 9! bear directly on the reand under pin 202 to the mandrel. When' spective insulation rolls 2 and 4 so that the foil strips feed at the same rate as the insulation strips by the driving action of these insulation rolls.

The invention is particularly advantageous in that the foil is under less tension during the winding operation when the foil feed mechanism of this invention is used and consequently the machine can be run at higher speeds or weaker foil can be used without appreciable foil breakage. The invention is also advantageous with respect to the feeding of the foil strips, which in the condenser rolling practice, have their ends well within the ends of the paper or insulating strips in order to prevent touching and shortcircuiting of the foils. Since the foil ends are spaced back of the paper or insulating strip ends, the foil may not always be held by the mandrel. If there were no means for positively feeding the foil the rotation of the mandrel in such a case would roll up the paper or insulation, but since there is insuificient friction between the insulation and foil strips back of the mandrel the foils would remain stationary. But by the provision of the foil feeding mechanism according to this invention, the foil strips are fed forward at the same rate as the paper strips.

By the use of a device according to this invention, the loss of time and waste of paper which would be occasioned by the winding of rolls without any foil, is eliminated.

It is further noted that each foil is driven to feed at substantially the same rate as the paper which is driving it, thereby reducing the tension on the foil and minimizing breakage of the latter.

Although the foil feeding devices of this invention are illustrated in connection with this particular winding mechanism, it should be understood that it is useful also with other types of winding mechanisms in which insulator strips and foil strips are wound on a mandrel.

I claim:

1. In a machine for feeding strips of conducting and insulating material to a mandrel for winding into a condenser roll, a supporting means, a plurality of rolls of insulating strip rotatably carried by said supporting means, means passing the strips from said rolls to the mandrel, a separate roll of conducting strip, said conducting strip being adapted to be fed adjacent said insulating strips on the way to said mandrel, and means for independently rotatably supporting said conducting strip roll so that the roll as a whole is movable and resiliently held with its surface in frictional engagement with the surface supporting means, means independently rotat-' ably supporting a conducting strip roll and an insulating strip roll so that said rolls are relatively movable and resiliently held together with the surfaces of their respective strips in frictional engagement with each other at the peripheries of the rolls so as to feed the insulating strip from the insulating roll and the foil strip from the foil roll at the samerate, and means passing saidstrips from said rolls to the mandrel so that the said strips are wound together into a condenser roll thereon.

HENRY FRANK HILD. 

